DE7824931U1 - MIXING OR STIRRING DEVICE - Google Patents

Description

TER MEER ■ MÜLLER · STEINMEISTER. . · ·; <MTI-MiSChtechnik

- 4 DESCRIPTION

The invention relates to a mixing or stirring device with a substantially cylindrical container having an outlet, one arranged in the container Agitator and at least one purge gas inlet entering the container.

Such a mixing or stirring device is known from DE-PS 1 432 998, which also provides a discussion of the further prior art results. When preparing or mixing dry, powder or cigglomerate-shaped materials must generally be special Fourth, the reprocessing container must be completely emptied when changing batches. This applies, for example, if a color change is made in the paint or plastics industry or if there is a general risk there is that batch residues reduce the quality of the following batch or even lead to the formation of rejects be able.

Mixers and agitators that run alone tend to fluidize residual quantities so strongly and 2übesekleunigugen, which is a practically stationary one Dust ring forms, which rotates essentially at the speed of the tool tips in the container. After Switching off the drive of the agitator and thus when the speed of the agitator decreases, this dust ring falls together. A small part is still conveyed out through the outlet by the discharging agitator, however, most of it remains in the container, since the conveying effect of the discharging agitator is insufficient is. In general, the residual emptying of slow-running agitators is also insufficient if there are no scrapers can be used.

Numerous attempts have been made to overcome this problem.

7824931 12/14/71

TER MEER - MÜLLER STEINMEISTER,

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been taken, the aforementioned DE-PS describes one Mixer in which nozzles for a gaseous fluid are attached to the support arms of the mixing tools are directed against the direction of rotation at an acute angle to the container wall. These nozzles remove the residual dust from the container walls, but do not result in a targeted flow in the direction of the outlet.

Furthermore, the DE-PS mentions a mixing container as known, in the jacket of which openings for introducing compressed air into the interior of the mixing container are provided. However, these nozzles only direct the air jet at a certain point the container wall and are too far away from the other areas of the container wall. You also surrender no targeted gas flow.

From DE-GM 72 34 013 a mixing container with a rotatably mounted rotary vane is known to your Luftdüssn are attached for blowing out the container. This solution is relatively complicated and special Embodiment of a mixer with a plurality of cooling or heating means arranged in the interior of the mixing container Rings aligned.

The invention is based on the object of creating a mixing or stirring device of the type mentioned at the beginning, which allows the container to be emptied as completely as possible when changing batches.

This object is achieved in a mixing or stirring device of the generic term in that the flushing gas inlet runs at an acute angle to a wall of the container and is substantially aligned with the outlet.

The purge gas can be supplied as a steady stream or in intermittent, sharp jolts are initiated and results in a targeted flow in the direction of the outlet, so

7824931 14.1171

TER MEER - MÜLLER ■ STEINMEISTER ... WTI.-MlSChtechnlk

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that the batch residues are released and discharged through the outlet will.

The principle of the invention is applicable to both horizontal mixers and vertical mixers. With horizontal Containers in which the outlet is located in the central area of the container jacket and radially obliquely downwards and outside runs / is preferably at least one purge gas inlet inclined on the side opposite the outlet arranged downwards, while at least one further purge gas inlet is located in the region of an end wall of the container and there is also directed downwards.

In the case of vertical containers in which the outlet is at the lower edge, there is preferably at least one Purge gas inlet provided on the edge of the upper end wall and downward at an angle to the inside of the container jacket Details of the invention emerge from the subclaims.

In the following, preferred exemplary embodiments of the invention are explained in more detail with reference to the accompanying drawings. 25th

1 shows a partially cut-away schematic end view of an embodiment the invention with a horizontally lying container? 30th

Fig. 2 is a partially cutaway plan view of Fig. 1;

Fig. 3 shows a corresponding, partially cut-away side view with flushing

gaszuxuhx dixcch. a fan;

TER MEER - MÜLLER · STEINMEISTER ,,, ... , MTI «Mö.S3hteChnik

Figure 4 is a partially cut-away side view of one embodiment of the invention with a vertical container and pressure accumulator; 5

Fig. 5 shows a similar embodiment with purge gas supply by a fan.

In Fig. 1, a substantially cylindrical container 10 is shown, which on a frame 12 is substantially horizontal and is fixedly arranged * The container 10 has a Opening flap 16 to be locked by a closure 14 and an outlet 18 which is closed by a cover 20 «The outlet 18 lies approximately in the middle area of the container jacket 22 and merges into a tube 24 which extends radially to the container 10 and obliquely downwards.

In the container there is an agitator 26 with support arms 28, at the outer ends of which tools 30 for stirring or mixing the material to be processed are attached.

The tube 20 merges via a further tube 32 into a secondary container 34 which is arranged lower than the container 10, so that the material emerging from the outlet 18 can fall down by gravity.

In the area of the tips of the tools 30, the Rotating the agitator 26 a practically stationary dust ring 36, which is essentially at the speed of The agitator rotates. This dust ring 36 collapses when the speed of the agitator 26 decreases and is in each Trap not fully discharged.

In order to discharge such material residues, a purge gas system is provided according to the invention which has a number of purge gas inlets 38, 40, 42, 44 (FIG. 2) which enter the container 10 outside the paths of the tools 30. the

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Purge gas inlets 38, 40, 42, 44 provide the ends of pipelines 46, 48, 50, 52, which start from a common control valve 54. The purge gas inlets 38, 40, 42, 44 are each at an acute angle on the palm of the palm of the hand of the container directed and overall substantially aligned with the outlet 18, so that they have a gas flow generated in the direction of the outlet 18. The purge gas inlets can be pointed in the shape of a nozzle or not shown Have nozzle inserts. In detail, the flushing gas inlets 40, 42 generally occur essentially tangentially to the container jacket 22 a and are directed to the bottom, while the purge gas inlets 38,44 through the end walls 56,58 of the The container run, but also to the bottom of the | Container are directed. *

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The valve 54 is connected to a pressure vessel 60 which, via a schematically indicated valve 62, is supplied with a pressurized gas, for example compressed air is applied.

The purging gas can be supplied continuously or intermittently in sharp jolts through the valve 54 and the pressure vessel 60 be dispensed into the container 10, provided that a batch change or a shutdown of the mixing and agitator a complete cleaning is intended. The arrangement of the flushing gas inlets 38, 40, 42, 44 is on the one hand, the layer of dust that has collapsed at the bottom of the container is blown out directly through the outlet 18. In addition, a circulating air flow is generated in the container as a whole, which is adhering in other positions Dust dissolves and discharges through outlet 18.

From the pipe 32 branches off a connecting pipe 64, which with a filter 66 is connected, in which a filter bag 68 is located. In the filter bag 68, the purge gas is from freed the blown dust, so that the purge gas in

purified form can exit through an outlet 70. | Heavier particles fall directly into the secondary container

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- 9 34 down.

The embodiment of FIG. 3 corresponds essentially to ■ those of Figures 1 and 2, so that they will not be explained in detail. In contrast to the previously However, the embodiment described is a in Fig * 3 Fan 72 is provided with a drive motor 74, which via pipes 76 and 78 and purge gas inlets 80 and continuously through the end walls 56, 58 of the container 10 Injects purge gas if the container 10 is to be cleaned. Otherwise there are no differences to the embodiment described above.

In the embodiment of FIG. 4, a vertically arranged Container 90 is provided, which is surrounded by a heating or cooling jacket 92. An outlet 94 emerges laterally at the lower edge of the container jacket 96. The container 90 is in the area of the outlet with a cylindrical Approach 98 is provided, which carries in a known manner exne cylinder-piston assembly 100, which has a closure cap 102 advances or withdraws from outlet 94. From the cylindrical extension 98 runs an outlet connection 104 obliquely downwards.

Through the bottom 106 of the container 90 also enters

In a manner known per se, a shaft 108 which carries an agitator 110. Forms in the area of the container jacket 96 In turn, a practically stationary dust ring 112 is located at the tips of the stirring tool, which when the outlet is opened 94 is not carried out to a sufficient extent.

In order to discharge such residues,

ji guide form of Fig. 4 in the upper cover 114 purge gas inlet

let 116,118,120 provided by the edge of the lid

X 35 in positions distributed over the circumference are directed obliquely downwards onto the container jacket 96. In this case, too, the purge gas inlets 116, 118, (20 are via pipelines

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122,124,126 connected to a control valve 128, which with a pressure vessel 130 is in communication. The pressure vessel 130 is over in the manner already described a valve 132 is acted upon by a pressurized gas. 5

The operation of the flushing system according to the invention corresponds essentially that of the embodiment described above, so that no further explanation is necessary is.

The embodiment of FIG. 5 differs from that 4 in turn in that the arrangement of pressure vessel 130 and control valve 128 by a fan 134 is replaced. This fan 134 delivers a continuous flow of purge gas to one via a conduit 136 Purge gas inlet 138 which enters the container 90 through the cover 114 on the opposite side from the outlet 94 and is directed obliquely downwards towards the container jacket 96.

In the embodiments of FIGS. 4 and 5, a filter is not shown. The filter can be used after the emptying process and after closing the outlet 94 are cleaned, for example, by a vibrator.

7124931 K12.78

Claims (1)

PATENT LAWYERS "" "" TER MEER - MÜLLER - STEINMEISTER D-SOOO Munich 22 3-4800 Bielefeld TriftsiraSe 4 Siekerwa !! 7th St / ge I MTI mixing technology industry anlagen GmbH Braunenbruche ?: Route 10 4930 Detmold 1 MIXING OR STIRRING DEVICE Protection claims 1. Mixing or stirring device with an essentially I cylindrical container having an outlet, a I arranged in the container agitator and at least one I nem purge gas inlet entering the container, thereby I 5 characterized in that the purge gas inlet (38, 1 40, 42, 44; 80, 82; 116, 118, 120; 138) at an acute angle to a I wall (22,96) of the container (10,90) runs and in the western J sentlichen is aligned with the outlet (18,94). 10 2. Mixing or stirring device according to claim 1, characterized characterized in that the purge gas inlet (38, 7824931 12/14/78 TER MEER - MÖLLER - STElNMEfSTER 40,42,44; 115,118,120) via a Hegel valve (54,128) with a pressure vessel (60,130) is connected. 3. Mixing or drilling device according to claim 1, characterized characterized in that the purge gas inlet (80, 82; 138) is connected to a fan (72,134). 4. Mixing or stirring device according to one of the preceding Claims, with an essentially horizontally ; 10 orderly container and one in the middle area of the container > jacket obliquely and essentially radially out of the container exiting outlet, characterized in that at least one of the outlet (18) is diagonally opposite downwardly entering the container (10) and at least one of an end wall (56,58) of the container at an angle Purge gas inlet directed downwards towards the bottom of the container (38,40,42,44) is provided. 5. Mixing or stirring device according to claim 4, characterized in that two in the container jacket (22) entering and two purge gas inlets (38,40,42,44) entering through the end walls (56,58) of the container intended simmer. 6. Mixing or stirring device according to one of claims 1 to 3, with a substantially vertically arranged Container and an outlet emerging at the lower edge of the container, characterized by at least one entering from the upper lid (114) of the container (90) at an acute angle in the direction of the container jacket (96) Purge gas inlet (116, 118, 120; 138). 7. Mixing or stirring device according to claim 6, characterized ./■ marked that the purge gas inlet (138) enters the container (90) on the side opposite the outlet (94). 7824931 12/14/78 • «Il TER MEER - MÜLLER STEINMEISTER. '; MTli-McLsehteohniiR '. 8. Mixing or stirring device according to claim 6, characterized in that a plurality of flushing gas inlets (116,118,120) are provided distributed in scope. 9. Mixing or stirring device according to one of the preceding claims, characterized in that the flushing gas inlets (38,40,42,44; 30,82; 11-6,118,120; 138) into the container (10,90) comprises pipe sections.
10 10. Mixing or stirring device according to one of the preceding claims, characterized in that that the purge gas inlets (38 ... 138) have nozzles at their ends entering the container. 15th 11. Mixing or stirring device according to one of the preceding Claims »characterized in that the outlet (18, 94) is connected to a filter (66). 20th